Cannot login from Epic Games Launcher in dev sandbox mode, is it normal?

Hi! Hope someone could help me ^^

I have a question about EGL on dev sandbox with EOS login.
In fact if I run my UE game in standalone the player is invited to allow permission and everything is fine.
But from the EGL I don’t have this prompt (I guess it’s normal) so I first try to login in “exchangecode”. I don’t have any error but the application seems to not be really linked and some features as achievements don’t work at all from here.

If I search the player in dev portal, from standalone he is here, but from EGL it’s empty.

I’m wondering if it’s because of the dev sandbox mode or if I missed something about the EOS login.

Thank you very much by advance!

It’s likely the SDK isn’t being initialized correctly. Try enabling logging in your build, and the logs should have a good hint to what your issue is.